Organic light-emitting transistors with a thin metal layer covering a diffraction grating |
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Authors: | Yuki Obama Yusaku Sakurai Takenori Kitazawa Shu Hotta |
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Institution: | Department of Macromolecular Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto, Japan |
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Abstract: | We fabricated organic light-emitting transistors (OLETs) characterized by an Ag layer deposited on a one-dimensional (1D) or two-dimensional (2D) diffraction grating that acts as a combined gate insulator with SiO2. The Ag layer was entirely covered with an organic crystal. Upon photoexcitation that crystal showed narrow linewidth emissions (NLEs) parallel to the substrate plane. The narrowed lines were either redshifted or blueshifted with rotation of the crystal around a normal to its surface with respect to the grating wave vector. Strong emissions (~104–106 cd m?2) accompanied by current-injected NLEs were observed from the 1D and 2D grating OLETs. |
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Keywords: | Organic light-emitting transistors thiophene/phenylene co-oligomer diffraction gratings organic crystals |
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